Steel retainer



Yarn-20. 1925. Y

W. A. SMITH .S'I'EEL RETAINER I Filed Aug. 6, 19275 /zI-I L IV u Mlle mull-5m i112. Z

- INVENTOR ms- ATr'o Ev;

Patent ed J an. 1 925.

' UNITED sTATES,

PATENT OFFIC w I-Luh'm A. s'mrrrr, or n'rnnns, rEn'nsYLvANIA, As'sIeNon r meEasoLL-amn company, or. JERSEY CITY, nnw 'ZIERSEY, A conronn'rxonornnw JERSEY.

A s'rnnr. nE'rArNER.

Application filed August 6, 1923. Serial No. 655,920.

To all whom it'may concern Be it known that I, WiLLIAM A. SMITH, a citizen of the United States, and a resident of Athens, county of Bradford, and 5 State of Pennsylvania, have'inv'ented a certain Steel Retainer, of which the following "is a specification, accompanied by drawings. This invention. relates to drill steel retainers of the type in which a yoke embraces the steel and is suitably held in position upon the front head of the tool.

The primary object of the present invention is to produce a yoke retainer having portions which are adapted to frictionally engage a front head member for holding the retainer in a desired operative or in'oper ative position, relative to the drill steel.

Another object of the invention is to secure a retainer which is simple in its construction and operation, chea to manufacture and readily applied-to t e front head of a rock drill. or a similar machine.

Further objectsgwill hereinafter appear and the invention is shown in the a'ccompanying drawings, in which end .of a rock'drill, a t

Figure 2 tea side elevation at right angles to Figure 1, 4

Figure 3-is a horizontal" sectional view taken on the line H of Figure 2 looking in thedirection of the arrows, and

.Figure 4 is a vertical sectional view of the front end portion of the rock drill taken onthe line of Figure3."

Referring to the. drawin A represents a portion of a fronthead of a fluid actuated percussive tool, in this instance a rock drill. The front. head is adapted to be held to the usual} cylinder by the springpremed side bolts B. A ortionoiia' reciprocating.

hammer piston. and a rotation sleeve D are indicated for the, urposes of-illustra-.

' tion. '-The sleeve D is'a a ted toreceive and the flange F to turning the sprin Figure 1 is a side'elevation of the front" impart rotation to the V00 ared, steel E. The resof the steel retainer are pivoted. A yokejLis in this instance formed integrally with the side arms K and is adapted to embrace the drill steel E below the collar E. In order to cushion the outward movement of the yoke L, a coil spring 0 is mounted on the tapered end portion F of the front head between the ring G and the flange F on the extreme forward end of the tapered portion F. A. portion of a screw thread P is formed in 66 permitthe coil spring 0 to be readily twisted onto'the front head by on the screw thread.

' In order to hol the yoke L and arms K inoperative position relative to the drill 70 steel E, portions of the arms K are bent in= wardly. at,Q,, and these bent-in portions extend under and frictionally engage the underside of the ring G, so that the yoke L is held in position about the drill steel E.

Whenever it is desired to .remove the drill steel from the front head, the yoke L and side arms K"may be swung on their pivots. away from the steel and the bent end portions Q will frictionally engage the ring G ,80 thereby holding the retainer in the desired inoperative position. 4 The arms 'K may be swung to such an extent that the bent portions Q, engage the top of the ring G and 'thus hold the yoke'.L away from the drill steel. a i

This drill; steel retainer is extremely simple in its construction, the'cost. of manufacture.comparatively small and the retaineroperates satisfactorily and efliciently.

.I claim: 1 1. A .drill steel retainer comprising incombination with a fronthead, a ring enfeircling the front head longitudinally movable, ushioned trunnions on said ring, a yoke adapted to embrace a. drill steel, side arms carried ;by the nyoke and pivoted to saidtrunnions, inwa y bent end portions on'said arms adapted to frictionally retain the yoke in operative-position about the drill steel or in inoperative position away from the'drill steel.

2." A drill steel retainer comprising in combination with a front head, a ring encircling Y the front head trunnions carried by the ring, means for 'ion-ing the movement of thering,"a yoke adapted to embrace a drill steel,

side arms carried by the oke and pivoted on said trunnions, the en I ortions of said side armsbemgbent to fr ctionally retain no the yoke in operative position about the drill steel orin inoperative position away from the drill steel.

3. A drill steel retai'ner comprising in combination with a front head, a ring encircling the front head, trunnions carried by the ring, a coiled spring for cushioning the movement of the ring in one direction, a

yoke adapted to embrace a drill steel, side.

arms carried by the yoke and pivoted to said trunnions, lnwardly bent end portlons on said side arms adapted to cooperate with 4. A drill steel retainer comprising in combination with a front head having a reduced end portion, a ring encircling the front head, trunnions carried by the ring, a coil spring encircling the reduced portion of the front head, a yoke adapted to embrace a drill steel, side-arms integral with the yoke and pivoted to said trunnions, inwardly bent end portions on said arms adapted to cooperate with said ring for holding the said'arms in a desired operative position about the drill steel or in inoperative position away from the drill steel.

In testimony whereof I have signed this specification. i

WILLIAM A Sldl'lH. 

